/*公共常量*/
body,
h1 {
  margin: 0;
  padding: 0;
  border: 0;
}
h1 {
  background: #003366;
}
.example-enter {
  opacity: 0.01;
}
.example-enter.example-enter-active {
  opacity: 1;
  transition: opacity 500ms ease-in;
}
.example-leave {
  opacity: 1;
}
.example-leave.example-leave-active {
  opacity: 0.01;
  transition: opacity 300ms ease-in;
}
